Courtney Celeste is starting Celeste Consulting Services, a small service business. Celeste Consulting Services uses the account

Response:

a. 55 cars

b. 25 cars

Detailed explanation:

Let’s denote the quantity of cars with stereo systems as N(ss), those with air conditioning as N(ac), and those with sunroofs as N(sr).

We find that:

N(ss) = 30

N(ac) = 30

N(sr) = 40

N(ss and ac and sr) = 15

N(at least two) = 30

a.

To calculate how many cars possess at least one feature (N(at least one) or N(ss or ac or sr)), we apply:

N(ss or ac or sr) = N(ss) + N(ac) + N(sr) - N(ss and ac) - N(ss and sr) - N(ac and sr) + N(ss and ac and sr)

N(ss or ac or sr) = 30 + 30 + 40 - (N(at least two) + 2*N(ss and ac and sr)) + 15

Substituting, we find N(ss or ac or sr) = 30 + 30 + 40 - (30 + 2*15) + 15 = 55

b.

For those cars that have exactly one feature, we have:

N(only one) = N(at least one) - N(at least two)

N(only one) = 55 - 30 = 25

It grows at T because the behavior has accelerated

Answer:

The proportion of the population that attempted to stop smoking is 0.8239.

Step-by-step explanation:

In the problem, we are provided with the following details:

Total sample size, n = 142

Individuals who attempted to quit smoking = 117

Parameter:

• A parameter represents a numerical descriptor of a population.

The calculation for the population proportion is as follows:

The proportion of the population that attempted to stop smoking is 0.8239.